Pickling tank



May 3, 1932. l C. SHRWER 1,856,734

PICKLING TANK Filed Sept. 23. 1931 3 Sheets-Sheet l c. sHRxvER 1,856,734

PICKLING TANK s sheetsshep 2 Filed Sept. 25. 1931 EN mw m May 3, 1932.

May 3, 1932. C, SHRNER 1,856,734

PICKLING TANK Filed Sept. 23, 1951 3 Sheets-Sheet 3 Patented May 3, 1932 Unirse Srr CHARLES SHRIVER, 0F MASSILLON, OHIO PICKLING TANK Application led September 23, 1931. Serial No. 564,531.

This invention relates broadly to apparatus for pickling metal sheets, strips, and the like, and it has for its primary object to provide an improved construction of pickling J; tank of that type in which is employed a vertically reciprocable plunger, such plunger being designed for actuation to produce displacement of the pickling fluid in one part of the tank for effecting alternate increase and decrease of depth of such fluid in another communicating part which is utilized as a repository for the metal during the pickling thereof.

ln structures of this character, the plunger operates within a fluid-displacement chamber between one of the side walls of the tank and a fixed partition wall whichhas its lower edge occupying spaced position relative to the tank bottom to provide a passage thereunder through which the pickling fluid may course back and forth between said displacement and pickling chambers of the tank. In such structures, as commonly employed, the plunger and the walls forming the guideway therefor are uniformly constructed of wood, rather than metal, because the use of wood timbers has been found much more practicable, due to the rapid deterioration of ordinary metals subjected to continued contact with he acids of the pickling bath.

However, due to the fact that wood timbers so employed also deteriorate more or less rapidly, becoming swollen and more or less distorted, especially at and adjacent to the ends of the timbers employed in the partition walland plunger, free and unobstructed movement of the plunger in or through the displacement chamber may be maintained only for limited periods and at the expense of frequent repairs and replacements of parts, effected with considerable losses of time in the use of the tank. More specically, the timber walls defining the fluid-displacement chamber and the timbers of the plunger become swollen, especially at the ends thereof, to the extent that, in reciprocations of the plunger, free movement is obstructed, resulting in the engaging surfaces of the plunger and the walls becoming torn and splintered. Furthermore, the exposed ends of the usual tierods employed for securing together the various timbers of which the plunger and the partition wall are formed, as also th-e nuts carried by said rods', are rapidly coroded though contact with the acid bath to the eX- Ytent that frequent renewals or replacements thereof are required.

It is the chief object of .this invention to provide a pickling tank wherein the plunger ends and the adjacent portions of the walls forming the displacement chamber are firmly supported or held against distortion by metallic frame-like members which are specially resistantto the effects of the acid employed in the pickling bath, such members being employed to partially encase and sheath the ends of the plunger and the adjacent surfaces of the timber walls defining the displacement chamber, thereby to insure the preservation over relative long periods of time of a great- 70 ly improved working relation between said plungerv and said displacement chamber walls; also to provide means for sheathing the ends of the tie rods and their attaching nuts in a manner preventing ready access 5 thereto of the acids of the pickling bath, resultting in greatly prolonging the life of said par s. v

In describing the invention in detail, reference is herein had to the accompanying drawings, in which i Figure l is a transverse section of my improved pickling tank, showing my invention, the plunger being shown in end elevation;

Figure 2. is a view of a fragmentary por- 85 tionof the tank and vthe plunger, partly in top plan and partly in section, the section being taken substantially on line 2-2, Fig. 1

Figure 8 is an enlarged fragmentary detail section of the plunger taken substantially on line 3 3, Fig. 2;

Figure 4 is a lower edge elevation of a fragmentary portion of the plunger, showing a bolt-sheathing cap;

Figure 5 is a fragmentary detail section of the partition wall, taken substantially on line 5 5, Fig. 2;

Figure 6 is a lower edge elevation of va fragmentary portion of the division wall, showing a tie-rod sheathing cap;

FIL

Figures 7, 8 and 9 are enlarged views in side, edge and lower end elevations, respectively, of the metal sheath bands for the ends of the plunger; and- Figures 10, 11 and 12 are similar views of the guide frame carried at each of the opposite ends of the fluid displacement chamber.

Referring to said drawings, 1 designates a side wall, 2 the opposite end walls,'and 3 the bottom of a metal-pickling tank-0f a more or less common commercial type. Said tank has rigidly mounted therein paralleltoand at a spaced distance from said side wall 1 a partition wall 4 which has its lower edge elevated relative tothetank bottom to provide an unobstructed passageway thereunder for the piekling` fluid betweenthe metal pickling compartment or chamber 5 of the tank and the space whic'h is located intermediate the walll and said partition.

The space 6 constitutesa fluid displacement compartment or chamber in which a .plunger`7 -is vertically reciprocable rfor alternately displacing downwardly therefrom and permitting return thereto of the pickling solution contained by the tank, whereby is effected alternately the raising and lowering within the compartment 5 of the level of said solution for covering and partially uncoveri-ng the'metal articles' to b-e treated, sloshing the aci'dpickling fluid over the surfaces of the sheets.

-The partition wall 4, as are also the various walls of the tank,is formed, `as ordinarily, ofaplurality of heavy wood timbers'4adisposed vin closely superpose'd seated relation and firmly' boundor tied together by means of a plurality of bolt-like tie rods 8 directed verticallj7 therethrough, as shown. For shielding the lower-ends of said rods against exposure' to thefluid or solution 0f the'pi'cklingba'th, the'said end Yof'each is screwed within a threaded socket 9 provided therefor in a cap 10 which has an integral' base portion 1'0a countersunk toman appropriate depth in thelower edge of the lpartition, as is clearly shown in Fig.`5, the outer -dimensions of saidv base and the socket-like seat 11 provided therefor in said edge being in substantial correspondence to aord a substantially fluid-tight joint, as shown in Figs. 5 and-6. As is manifest, said cap, countersunk as aforesaid, is effective for preventing access of the-acid solution to the threads of the tie rod. Said cap, which is constructed of an acid-resisting metal, is made of relatively great thickness to enable it to withstand the deteriorating effects of the acid overa long .period 'of time.

vFitted within the oppositeends of the fluid displacement chamber 6 is a guide-frame, preferably made :in the form of a vcasting of an acid resistant metal, and comprising a baekplate 12 adapted to be mounted in a vertical position directly against the end wall 2 of the tank, and integral inwardly directed lianges 13 adapted to rest against the side wall 1 at one side and against the partition wall 4 at the other side. Each guide frame also includes an integral cap-plate 14 adapted for mounting in seated position upon the top of the adjacent end wall'Q. The flanges 13 are suitably prolonged upwardly above the level of said cap-plate, forming extensions 18 which have their upper ends flared outwardly in opposite directions, as shown at 13b, for

vfacilitating entrance of the plunger 7 in the runway constituted by said back-plate 12 and the flan-ges 18.

Mounted in fixed embracing relation to the plunger at each of the opposite ends of the latter is a'band o'f acid resistant metal, preferably 'formed inra lsingle piece, comprising par- 4allel flat 'side members 15 designed, inreciprocations of the plunger, to operate against or slideuponthe'flanges 13 hereinbeforc referred `t`o,"as shown in Figs. 1 and2, one or more cross 4members 16, and a transverse bottom member or plate 17- connecting the lower ends of said members 15. The'upper ends ofsaid members.15,as herein shown, are convergently inclinedand occupy positions withinrecesses 18 provided therefor in the opposite sides of the V'plunge'r, and-are secured to said plunger by meansof through bolts 19 Tl1e bottom-member 17 is of substantially vrectangular plate form and has-formed integral therewith downwardly projecting knobs l2O, similartoffthe caps lOhereinbefore described,f-whichare sockete'dl for the reception of 'thefthreaded lower-endsof the end suspension rods 21 of the plunger,-asshown. vTie 'rodsQQ-for the'plunger-are-located intermediate said'end suspension rods'Ql, as'shown in .'I*`ig.'2,aridV Socke'ted capsQB Acountersun'k in vthe plunger have theb threaded lower ends of saidf-rods-QQ received thereby, as shown in Figs. 3ian'df4. r

`:Froin'tl-ie foregoing it ywill be understood that the guideframes interposed between the -end*portions fof the lpartition wall 4an`d the sidewall 1 serve, first, as spacers wherebg7 the thesaid plunger ends,'thus to insure that said plunger shall at all times be substantially free from# binding engagement with the walls of 'the 3displacement chamber and, consequently, that the life-of the plunger and the tank will y'be vmaterially prolonged. Moreover, due to the sheathing of the threaded ends of the tierods andthe suspension rods of the partition wall and thepiston, respectively, by means of the' capslO, knobs 20 and caps 23, the expected life ofs'aid rods is greatly increased.

What is claimed is- 1. In a pickling apparatus, the combination with a tank, of a wood partition wall located in parallel spaced relation to a side wall of the tank and dividing the interior of the latter to form separate pickling and fluid displacement chambers, said wall having a passage thereunder through which fiuid may course back and forth between said chambers, a metallic guide frame rigidly mounted on said tank within each of the opposite ends of said displacement chamber and forming a runway, a plunger for vertical reciprocation in said displacement chamber, said plunger having its ends at least partially encased and slidable within said runways.

2. In a pickling apparatus comprising a tank divided interiorly by a partition wall whereby are formed separate pickling and fluid displacement chambers, said wall being formed of timbers arranged in superposed relation and having its lower edge spaced from the bottom of the tank to provide an avenue of communication between said chambers, a

Y metal guide frame fitted between said partition wall and the adjacent side wall of the tank at each end of said displacement chamber for relatively bracing said walls and forming a runway, a plunger reciprocable within said displacement chamber, and metallic means embracing the ends of said plunger and slidable within said runways.

3. In a pickling apparatus comprising a tank divided interior-ly by a partition wall whereby are formed pickling and fluid displacement chambers, said wall being formed of timbers arranged in superposed relation and having its lower edge spaced from the bottom of the tank to provide an avenue of' communication between said chambers, a metal guide frame fitted between said partition wall and the adjacent side wall of the tank at each end of said displacement chamber for maintaining permanently the original spacing of said walls and forming runways, a plunger reciprocable within said displacement chamber, and metallic sheath-like devices borne by and maintaining the integrity of the ends of said plunger and rendering the latter freely shiftable along said runways.

4. In a pickling apparatus comprising a tank divided interiorly by a partition wall whereby are formed pickling and fluid displacement chambers, said wall being formed of timbers arranged in superposed relation and having its lower edge spaced from the bottom of the tank to provide an avenue of communication between said chambers, a metal guide frame fitted between said partition wall and the adjacent side wall of the tank at each end of said displacement chamber for maintaining permanently the original spacing of said walls and forming runways, a plunger reciprocable within said displacement chamber, suspension rods for said plunger directed vertically through the latter, and metallic end sheathing devices for said plunger, said devices including a transverse member embodying sockets in which the lower ends of said suspension rods are received.

5. In a pickling apparatus comprising a tank divided interiorly by a partition wall whereby are formed pickling and fluid displacement chambers, said wall being formed of timbers arranged in superposed relation and having its lower edge spaced from the bottom of the tank to provide an avenue of communication between said chambers, said partition wall including tie rods directed vertically through the timbers thereof, socketed caps countersunk within the lower edge of said wall and having the lower ends of said rods threaded therein and shielded thereby from liquid contents of the tank, a metal guide frame fitted between said partition wall and the adjacent side wall of the tank at each end of said displacement chamber for relatively bracing said walls and forming a runway, a plunger reciprocable within said displacement chamber, and metallic means embracing the ends of said plunger and slidable within said runways.

6. In a pickling apparatus comprising a tank divided interiorly by a partition wall whereby are formed pickling and fluid displacement chambers, said wall being formed of timbers arranged in superposed relation and having its lower edge spaced from the bottom of the tank to provide an avenue of communication between said chambers, said partition wall including tie rods directed vertically through the timbers thereof, socketed caps countersunk within the lower edge of said wall and having the lower ends of said rods threaded therein and shielded thereby from liquid contents of the tank, a plunger reciprocable within said displacement chamber, rods extending vertically through said plunger, and cap-like means receiving theV lower ends of said rods and whereby said ends are shielded against contact therewith of fluid contents of the tank.

7. In a pickling apparatus comprising a tank divided interiorly by a partition wall whereby are formed pickling and fluid displacement chambers, said wall being formed of timbers arranged in superposed relation and having its lower edge spaced from the bottom of the tank to provide an avenue of communication between said chambers, said partition wall including tie rods directed vertically through the timbers thereof, socketed caps countersunk within the lower edge of said wall and having the lower ends of said rods threaded therein and shielded thereby from liquid contents of the tank, a plunger reciprocable within said displacement chamber, rods extending vertically through said plunger, and cap-like means` receiving 'CTE thelower ends of said rods and whereby said ends are shielded against Contact therewith of fluid contents of the tank, metal guide frames fitted within the opposite endsof said displacement chamber and forming runways for the ends of said plunger, and metallic means at least partially sheathing said ends of the plunger and freely slidable within said runways.

8.-. In a pickling apparatus comprising a tank divided interiorly by a partition wall whereby are formed pickling and fluid displacement chambers, said wall being formed of timbers arranged in super-posed relation and having its lower edge spaced from the bottom of the tank to provide an avenue of communication between said chambers, said partition wall including tie rods directed vertically through the timbers thereof, a

\ plunger embodying superposed timbers and rods directed vertically through said timbers, socketed cap-like members receiving and shielding the lower ends of said rods, and cooperating metal guide members carried by each of the opposite ends of said plunger and by the tank at opposite ends of said displacement chamber whereby a free working relation is maintained between said ends of the plunger and the ends of said chamber. v

In testimony whereof, I aix myl signature.

CHARLES SHRIVER. 

